Vibrator.



No. 839,000. y PATENTED DEC. 18, 1906. E. B. JACOBSON. VIBRATOR.

APPLICATION FILED DBO. 19.1905

A 3 1 swim s UNITED STATES lPATENT OFFICE.

EDWARD .RYRON. JAOORSON, Or PirrsriRLD, MASSACHUSETTS, ASSIGNOR To PirrSriRLD SPARK conJ COMPANY, or rrrrsriRLD, MASSACHU- j SRTTS;

-Nasaaooe f To ctZ'Zy 'it .may concern.-

Be 1t known that I, EDWARD BYRON J AOOB- SON, .a citizen of the lUnited States, and a resident-of Pittsfield, inthe county of Berkshire tion'.

and State of Massachusetts, have invented a new and' improved LVibrator, of which the following 1s a ull, clear, andexact descrip to insure quick response, and to avoid waste vzo of the platinumand of electric current.

lThe invention consists ofy novel features parts 'and combinationsl of the same, which willy be more lfully described hereinafter and .then ointed outin the claims.

' A practical embodiment of the invention is representedjin the accompanying drawings, forming a part of this specification, in which similar characters Ofreference indicate corresponding parts in all the views.

Figure 1. is a plan view ofthe improvement. Fig. 2 isa sectional side elevation of thesame on the line22o Fig. l. Fig. 3 is a .transverse section ofthe sameon the line 3 3 of Fig. 1.

Fig. 4 is a perspective view of the reinforcing-spring for the armature-lever, and Fig. I5 is a perspective view of the armatureleveri ...The induction orother coil A, on which the im roved vibrator is a plied, is provided a core A', formed o the usual bundle of soft-iron wires and operating in conjunction with an armatureB, 'fastened by rivets C or like devices to a main spring D, secured by a screw E to a bracket F, fastened by screws F' and F2 to the top A? of the casing of the coil A, the said top being made of hard rubber or other insulating material. On the 'forward or free end of the .main spring D is secured a contact-point G, extending freely up through ya'n'opening B', formed in the forward end' of the armature'B, andthe said contact-point G Operates in conjunction with an adjustable 'contact-point H, Secured to or formed on'the lower end of a screw-'rod I, screwing in a boss J', formed on the bridge J, secured by screws l Specification of Letters Patent.

Application filed December 19,1905- Serial No. 292.504.

VIBRATOB.

Patented Dec. 18, 1906.

J2 and J3 to the top A2 of the coil-Casin A.

The boss J is split in the direction o its length and is threaded exteriorly, and on the said boss J screws a clamping-nut K for clamping the members of the boss J' iirmly onto the screw-rod I, so as to securely lock -the latter nplace after the same has been screwed up or down in the boss J' to bring the contact-point H in proper relation to the contact-point G. f

`By reference to Fig. 2 it will be seen that the clamping-nut K` has an interior bevel K', engaging the outer beveled end of the boss J', so that when the nut K is screwed down the 4members of the boss J' are forced inwardly in firm contact with the screw-rod 1 to luck the same in place, as previously. mentioned. When the nut K is partly unscrewed on the boss J', then .the members thereof by their own resiliency release the screw-rod I, s o that the latter can be screwed up or down in the `boss to bring the contact-point H in proper relation to the contact-point G, as above explained. When the desired.' adjustment is made, the nut K is screwed down for securely locking -the screw-rod I' against movement.

The under side of the main s ring D is engaged and pressed on by the ee end of an auxiliary spring L, passin over a cross-bar L', secured in the bracket and the rear end of the said auxiliary spring L is provided with an aperture L2 for thepassage ofthe reduced end or pin N' of a screw-rod N, screwing in a boss F3, forming art of the bracket F and similar to the boss '-that is, split in the direction of its length. By screwing the screw-rod N up or down more or less tension is given to the auxiliary spring L, resting on the bar L' as a fulcrurn,I and the said screwrod N after the desired tension is given to the auxiliary s ring L is locked in place by a clamping-nut 5, screwing On the boss F3, and similar to the nut K.

By reference to the drawings .it will b e seen that the rear ,end of the armature B 1s iastenedby therivets C to the main spring at a point between the free end of the main spring D andits point of attachment tothe lbracket F, andthe free end of the auxiliary spring L engagesthe under side of the main s ring D at the point between the free end of the main spring and its point of attachment. By this arrangement freez' or sticking of the contact-points G and H 1s rendered 1m- 2 ossible, owing to the fact that the amature little beyond or higher than the free end of the-main spring l) and When contact is againV made then the armature B descends with considerable force and breaksthe connection it impossible for the contactoints G and H to freeze or stick. It Will a so be noticed that by the arrangement described a-semihammer blow is given to the contactoint G, and the force of this semihammer b ow can be minutcly regulated by adjusting the screwrods I andN, as above explained. The auX- iliary sprin L has its strength so proportioned in re ation to the number of threads gas-en e or like machine.

per inch on the'screW-rod N that it can only e adjusted to consume a maximum of electric current at whichA the coil Will do its best work,- especially when the coil is used on a It will also be notice that by the use of the screws I and N anple provision is made for taking up Wear, an at the same time suiiicient friction is obtained by the use of the nuts K and O 4to ini ary s ring L, as previously described, andA shown the drawings, a very quick response 'of the amature is obtained, and the vibrator is consequently well adaptedfor use .on motorr armature secured on the main sprmg, a concar e es vibrators as heretofore constructed 1s due to the position ythe platinum contact-points occa y on the armature. It will be noticed that 1n the vibrator shoWnf and described the platinum contactt Gis mounted on the ring D and projects through the aperture in the armature B', and hence the spring D acts as a cushion. By-this arrangement the otherwise severe mechanical action Vof A 'the contact-point Grelative tothe contact- -point H is completely eliminated,'and` the double movement of the armature B and ring D has a tendency to agreat extent to elirm ate the electrolytlceffect of the current upon the platinum contact-point.

It is understood that the usual electrical connections are made between the vibrator and the rimary and secondary wires of the coil, an -the'screw F2 serves as a bindingt' for one line-Wire, the other line-Wire bgiang connected to the binding-post P.

From the foregoing it will be readily seen that the vibrator is extremely economical in the use of platinum for the contactints. The electric-ement economy of the vi rator described is due in alarge measure to. the cushioned mainspring D, also to the speed and impulsivenesso the varmature B.

The wasting of platinum contact-points in other words, the responsive power of the v ibrator oes not rest solely on the contactpoint. A ther reason for the economy in the electric current is that the vibrator cannot be adjusted to consume more than the maximum of electric current required to do the best work land'give the best results in the e ine on which it is to be used. between the pomts G and ll, thus making aving thus described my invention, I claim as new anddesire to secure by Letters Patenty 1. A vibrator comprising a main spring, an amature -secured on the main spring, and a contact-point ong-the main spring and project- Ying freely through an aperture in the armature. v

2. A vibrator comprisin a spring for attachment at one end to a ed support, and an armature overlying the free end of the said spring and secured thereto at its rear end at a point between the fixed and free ends of the spring.

3. A vibrator comprising a spring for attachment at one end to a fixed support, an armature overlying the free end o the said spring and secured thereto at its rear end at a point between the fixed4 and free ends of the ring, and a contactoint on the free end of t e spring and exten ing freely through'an aperture the said armature.

4. A vibrator comprising a maia spring, an amature secured on the mam spring, a contact-point on-the main spring, and-an auxili-ary spring engaging the said main spring.

5. A vi rator comprising a main spring, an

tact-point on the main spring, an auxiliary spring engagingthe said main spring, and' means for regu ating the tension of t e 'said auxiliary spring.

6. A vibrator comprising a sprintf for attachment at one end to afixed support .In ar'- mature overlying the free end of Ithe said springend securedv thereto atits rear end 'at a point between thefiXed and free ends ofthe spring, a contact-point on the ree'end of the spring and extending freely through an a .r

ture in the said armature, and an auxi ary spring engaging with its free end the lsaid main spring at ,a oint between the said contact-point and t e attachment of thesaid amature.

' 7. A vibratorcomprising a tachment at one end to a fixed su port, an armature overlying the .reeend o the said spring and secured thereto 'at its rear end at a point-between the fixed and free ends of the f spring, a contact-pointv on the free end ofthe spring and extending freely through an' aperture in the said armature, an auxiliary spring engaging with its Vfree end the said man1 spring at a point.' between the said contactpoint-and the attachment of'the said arma-'- ture, and means for regulating the tension of the said auxiiiary spring.

.point opposite the contact-point on the main armature secured on the main spring, a con- 'tact-point on the main spring and projecting 8.' A vibrator comprising a 'main spring, an armature on the mam sprlng, a contact-point on the mam spring, an adjustable contactsprlng, and an auxiliary said mam spring.

' 9. A vibrator comprismg a main spring, an

spring engaging the through an aperture 'in the armature, an ad justable contact-point opposite the said armature contactoint, and means for securing the adjustab e contact-point in place.

10. A vibrator comprising a main spring, an armature secured on the main spring, a contact-point on the main spring, an adjustable contact-point opposite the said armature contact-point, means for locking the adjustable contact-point in place, an auxiliary spring engaging the said main spring, and means for regulating Athe tensionof the said auxiliary spring. l

11. A vibrator comprising a spring for attachment at one end to a fixed support, an i armature overlying the Jree end of the said spring and secured thereto at its rear end at a point between the xed and Jfree ends of the spring, a contact-point on the free end ofthe spring and extending freely through an aperture in thesaid armature, an auxiliary spring engaging with 'its free end the said main spring at a point between the said contactpoint and the attachment of the said armature, and a tension-regulating device for the said auxiliary spring consisting of a screwrod having a point engaging the said spring, a split boss in which screws the said screwrod, and a clamping-nut screwing on the said boss to clamp the latter against the said screw-rod.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD BYRON J ACOBSON 

